Inventory

>look
You are in a dusty alcove. Nearby is something that requires three rare elements to function.

>check inventory
You are carrying:
A Chartreuse Houndstooth Handkerchief
A Stapler, Red
An Unused Prophylactic
A Sonic Screwdriver
A Self-Portrait of Norman Rockwell, but not the one you're thinking of,
A jar of Aqua Regia
A sheet of paper with a proof that P≠NP
A Clue
A magnetic monopole
A PlayStation memory card containing only Crash Bandicoot saves

>_